Single Vision Lenses: The Complete Prescription Guide 2026

Single vision lenses are the most widely prescribed lens type in the world, yet they are also the least explained. A single vision lens corrects one focal distance — distance, intermediate, or near — using a single optical power across the entire lens surface. Unlike progressive or bifocal lenses, there is no corridor, no segment, and no transition zone. The entire lens does one job, and when that job is matched precisely to your prescription, the result is optically cleaner than any multifocal design at the same index and diameter. This guide covers everything you need to know before ordering.

What Single Vision Lenses Are — and What They Correct

Single vision lenses are defined by a uniform refractive power across the entire lens surface. Every point on a single vision lens has the same sphere power, the same cylinder power, and the same axis — there is no variation from centre to edge in the intended prescription. This uniformity is what distinguishes single vision lenses from progressive lenses, which vary in power from top to bottom across a corridor of approximately 14–18 mm.

Single vision lenses correct three categories of refractive error. Myopia (short-sightedness) is corrected by minus sphere lenses, which diverge light before it enters the eye, moving the focal point back onto the retina. Hyperopia (long-sightedness) is corrected by plus sphere lenses, which converge light to compensate for an eye that focuses behind the retina. Astigmatism is corrected by cylinder power at a specific axis, which adds a toric surface to the lens to correct the unequal curvature of the cornea or crystalline lens. Most prescriptions combine sphere and cylinder correction in a single lens.

Single vision lenses are prescribed for distance wear, near wear (reading glasses), or intermediate wear (computer glasses). The distinction matters for lens ordering: a distance single vision lens is ground to the distance prescription; a reading lens adds the Add value to the distance sphere to produce the near power. Learn how to identify which type your prescription specifies in our eyeglass prescription guide.

Single Vision Lenses for Myopia — How Minus Lenses Work

Single vision lenses for myopia are minus lenses — they are thinner at the centre and thicker at the edge. The edge thickness increases with both the sphere power and the lens diameter. For a −3.00 DS prescription in a 52 mm lens at 1.50 index, edge thickness is approximately 5.5–6.0 mm. The same prescription in a 46 mm lens at 1.50 index reduces edge thickness to approximately 4.0–4.5 mm — a reduction of approximately 25% from the diameter change alone, before any index upgrade is applied.

The optical mechanism of a minus lens is divergence: the lens bends incoming light rays outward before they enter the eye, effectively moving the focal point from in front of the retina (where it sits in a myopic eye) back onto the retinal surface. The power required to achieve this is expressed in negative dioptres — a −1.00 DS lens diverges light by 1 dioptre; a −6.00 DS lens diverges light by 6 dioptres, requiring significantly more curvature and therefore more edge thickness at equivalent diameter and index.

For myopia above −4.00 DS, index selection becomes the primary tool for managing lens thickness and weight. Our guide to thick lenses explains the relationship between prescription power, lens diameter, and index in detail, with specific thickness comparisons across the 1.50 to 1.74 index range.

Single Vision Lenses for Hyperopia and Astigmatism

Single vision lenses for hyperopia are plus lenses — they are thicker at the centre and thinner at the edge. Centre thickness increases with plus power: a +3.00 DS lens in a 52 mm frame at 1.50 index has a centre thickness of approximately 4.5–5.0 mm. Higher plus powers — above +4.00 DS — produce lenses that are visually prominent and heavy at standard index, making high-index materials particularly beneficial for hyperopic prescriptions.

The optical mechanism of a plus lens is convergence: the lens bends incoming light rays inward before they enter the eye, compensating for an eye whose focal point falls behind the retina. For hyperopia above +3.00 DS, a minimum index of 1.60 is recommended to keep centre thickness below 4 mm in standard frame sizes. For hyperopia above +5.00 DS, 1.67 or 1.74 index is preferable.

Astigmatism correction adds a cylinder component to the lens, creating a toric surface — a surface with different curvatures in perpendicular meridians. The cylinder power is always paired with an axis value (1–180°) that specifies the orientation of the correction. A prescription of −2.00 DS / −1.50 DC × 090 requires a lens with −2.00 dioptres of sphere power and an additional −1.50 dioptres of cylinder power in the 90° meridian only. The axis must be reproduced exactly during lens fabrication — a 5° axis error in a −1.50 DC prescription introduces measurable blur and spatial distortion. Our eyeglass prescription terms glossary explains sphere, cylinder and axis in full clinical detail.

Single Vision Lenses Index — Choosing the Right Thickness

Refractive index is the single most important variable in single vision lens selection after the prescription itself. A higher index produces a thinner, lighter lens at equivalent prescription power because the material bends light more efficiently, requiring less curvature — and therefore less thickness — to achieve the same optical correction.

The standard index options and their recommended prescription ranges are:

1.50 (CR-39) — the baseline standard plastic. Abbe value 58 (lowest chromatic aberration of any index). Recommended for prescriptions up to approximately ±2.00 DS. Above this power, edge or centre thickness becomes visually prominent in standard frame sizes.

1.56 — a modest step up from 1.50, approximately 10% thinner at equivalent power. Suitable for prescriptions up to approximately ±3.00 DS. Abbe value approximately 37.

1.60 (MR-8) — approximately 20% thinner than 1.50 at equivalent power. The recommended minimum index for prescriptions above ±3.00 DS. Abbe value approximately 41. Available through the Bclear Lenses and Zirosat Lenses collections at FuzWeb.

1.67 (MR-7) — approximately 30% thinner than 1.50. Recommended for prescriptions above ±4.00 DS. Abbe value approximately 32. Available through the Reven Jate Lenses collection and the Bobbie MR-7 collection at FuzWeb.

1.74 (MR-10) — the thinnest commercially available single vision index. Approximately 40% thinner than 1.50 at equivalent power and diameter. Recommended for prescriptions above ±6.00 DS. Abbe value approximately 33. Available through the Bobbie MR-10 collection.

Our dedicated high index lenses guide and 1.61 vs 1.67 comparison provide detailed thickness comparisons with specific measurements at common prescription powers.

Single Vision Lenses Coatings — What FuzWeb Includes as Standard

All FuzWeb single vision lenses are fabricated with five coatings included as standard on both surfaces — no upgrades required for baseline optical quality. These are: UV400 protection (blocks 100% of UVA and UVB radiation up to 400 nm wavelength); HMC (Hard Multi-Coat) (a multi-layer hardening treatment that increases surface scratch resistance by approximately 10× compared to uncoated plastic); AR (Anti-Reflection) (reduces surface reflections from approximately 8% to less than 0.5% of incident light, improving contrast and reducing glare); Hydrophobic treatment (causes water to bead and roll off the lens surface rather than spreading into a film); and Oleophobic treatment (reduces fingerprint adhesion and makes cleaning easier by lowering the surface energy of the lens).

Optional upgrades available for single vision lenses include photochromic treatment (lenses darken in UV light and return to clear indoors), anti-blue-light coating, tinted lenses, and polarized lenses. These are additions to the standard coating stack, not replacements for it.

Single Vision Lenses vs Progressive Lenses — Which Do You Need?

Single vision lenses correct one focal distance; progressive lenses correct three — distance, intermediate, and near — in a single lens with a continuously varying power corridor. The choice between them is determined by your prescription and your visual needs, not by age alone.

Single vision lenses are the correct choice when your prescription requires correction at only one distance — for example, a myope who sees clearly at near without glasses, or a presbyope who needs reading glasses only. Single vision lenses are also the correct choice for dedicated computer glasses (intermediate distance) or dedicated driving glasses (distance only), where a single focal distance is required for a specific task.

Progressive lenses are required when your prescription includes an Add value — the additional near power that corrects presbyopia. An Add value on your prescription means your eyes can no longer accommodate (focus) between distances without optical assistance, and a single vision lens will only correct one of those distances. Our progressive lenses guide explains what progressive lenses feel like in practice and how the adaptation period works.

How Lens Diameter Affects Single Vision Lens Thickness

Lens diameter — determined by the frame you choose — is the second most controllable variable in single vision lens thickness after index. For minus lenses, edge thickness increases with diameter because the lens must be thicker at the edge to maintain the required centre thickness and optical power. For plus lenses, centre thickness increases with diameter because the lens must be thicker at the centre to achieve the required convergence across a larger surface area.

The relationship is not linear. For a −5.00 DS prescription at 1.60 index, increasing lens diameter from 46 mm to 52 mm increases edge thickness by approximately 1.5–2.0 mm — a significant visible difference. Reducing diameter from 52 mm to 46 mm at the same index produces the same thickness reduction as upgrading from 1.60 to 1.67 index at 52 mm diameter. Frame selection is therefore as important as index selection for managing single vision lens thickness.

Round frames require particular attention to diameter because the edge thickness is uniform around the full circumference — there are no corners where thickness is reduced. Our frame measurement guide explains how to identify the correct lens diameter for your face width, and our glasses fitting guide covers how frame position affects the optical performance of single vision lenses.

How to Order Single Vision Lenses at FuzWeb

Ordering single vision lenses at FuzWeb requires four data points from your prescription: the sphere power (SPH), the cylinder power (CYL) if present, the axis if CYL is present, and your pupillary distance (PD). For reading glasses, you also need your Add value to calculate the near sphere. Enter OD values in the right eye fields and OS values in the left eye fields — never reverse them. Enter all values with their signs exactly as written on your prescription.

For the most affordable single vision lens options at FuzWeb, three brands offer excellent value across the index range. Bclear offers single vision lenses from 1.56 to 1.74 index including photochromic and clear options — browse the Bclear Lenses collection. Zirosat specialises in aspheric single vision designs that reduce peripheral distortion compared to standard spherical lenses — browse the Zirosat Lenses collection. Reven Jate offers single vision aspheric and photochromic options at competitive price points — browse the Reven Jate Lenses collection. For the highest index options (1.67 and 1.74 MR series), the Bobbie collection carries MR-7 and MR-10 lenses.

Measure your PD accurately before ordering — a PD error of 1 mm introduces approximately 0.33 prism dioptres of unwanted horizontal prism per dioptre of sphere power. Our PD measurement guide explains the monocular measurement method required for asymmetric faces. Then follow the FuzWeb 6-step lens ordering process to submit your prescription and measurements correctly.

FAQ About Single Vision Lenses

What is the difference between single vision and progressive lenses?

Single vision lenses have a uniform optical power across the entire lens surface and correct one focal distance only — distance, intermediate, or near. Progressive lenses have a continuously varying power from top to bottom, correcting distance at the top, intermediate in the middle, and near at the bottom. If your prescription includes an Add value, you require progressive or bifocal lenses. If it does not, single vision lenses are the correct choice.

What index should I choose for single vision lenses?

Index selection depends on your prescription power. For prescriptions up to ±2.00 DS, 1.50 index is adequate. For ±2.00 to ±4.00 DS, 1.60 index is recommended. For ±4.00 to ±6.00 DS, 1.67 index is preferable. For prescriptions above ±6.00 DS, 1.74 index produces the thinnest result. Frame diameter also affects thickness — a smaller frame at lower index can produce the same thickness as a larger frame at higher index.

Can single vision lenses correct astigmatism?

Single vision lenses fully correct astigmatism when the prescription includes a cylinder (CYL) value and axis. The cylinder component adds a toric surface to the lens that corrects the unequal corneal curvature causing astigmatism. There is no additional lens type required — a single vision lens with sphere and cylinder correction addresses both refractive errors simultaneously in one lens.

What is an aspheric single vision lens?

An aspheric single vision lens has a front surface that flattens progressively toward the edge rather than maintaining a constant curve. This flattening reduces peripheral distortion and allows the lens to be made thinner and flatter than an equivalent spherical design. Aspheric designs are particularly beneficial for plus prescriptions above +2.00 DS, where standard spherical lenses produce a magnified, bulging appearance. Zirosat’s aspheric single vision range at FuzWeb uses this design across their index options.

How long does it take to adapt to new single vision lenses?

Single vision lenses typically require no adaptation period for wearers replacing an existing single vision prescription with a similar power. For first-time wearers or significant prescription changes — more than 1.00 DS sphere or 0.50 DC cylinder — a brief adaptation period of 1–7 days is normal as the visual cortex adjusts to the new optical correction. Distortion at the lens periphery during adaptation is normal and resolves as the brain learns to use the central optical zone preferentially.

Do single vision lenses work for computer use?

Single vision lenses are the optimal lens type for dedicated computer use when ground to the intermediate distance — typically 50–70 cm. A single vision lens at the intermediate prescription provides a wider, cleaner field of view at screen distance than the intermediate zone of a progressive lens, which is typically only 10–12 mm wide. If you require both distance and near correction, a progressive lens is more practical for general wear, but a dedicated single vision intermediate lens is optically superior for sustained screen work.

What coatings do FuzWeb single vision lenses include as standard?

All FuzWeb single vision lenses include UV400 protection, HMC (Hard Multi-Coat), anti-reflection coating, hydrophobic treatment, and oleophobic treatment on both surfaces as standard — at no additional cost. These five coatings are included in the base lens price regardless of index or brand. Optional upgrades available separately include photochromic treatment, anti-blue-light coating, tinted lenses, and polarized lenses.

One Distance, Done Right

Single vision lenses are the most straightforward prescription lens type available, but straightforward does not mean simple. The difference between a 1.50 index lens in a 54 mm frame and a 1.67 index lens in a 46 mm frame can be 3–4 mm of edge thickness — visible, heavy, and avoidable with the right information before ordering. Index selection, frame diameter, and accurate PD measurement are the three variables that determine whether your single vision lenses are optically precise and aesthetically clean.

FuzWeb’s single vision lens range covers every index from 1.50 to 1.74 across Bclear, Zirosat, Reven Jate, and Bobbie — with all five standard coatings included at every level. Use the FuzWeb 6-step ordering process to match your prescription to the right index and frame, and consult our PD guide and prescription reading guide before submitting your order.